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Microprocessor Voltage Regulator and Supervisory Circuit
The MC34160 Series is a voltage regulator and supervisory circuit containing many of the necessary monitoring functions required in microprocessor based systems. It is specifically designed for appliance and industrial applications, offering the designer a cost effective solution with minimal external components. These integrated circuits feature a 5.0 V/100 mA regulator with short circuit current limiting, pinned out 2.6 V bandgap reference, low voltage reset comparator, power warning comparator with programmable hysteresis, and an uncommitted comparator ideally suited for microprocessor line synchronization. Additional features include a chip disable input for low standby current, and internal thermal shutdown for over temperature protection. These devices are contained in a 16 pin dual-in-line heat tab plastic package for improved thermal conduction. * 5.0 V Regulator Output Current in Excess of 100 mA
MC34160 MC33160
MICROPROCESSOR VOLTAGE REGULATOR/ SUPERVISORY CIRCUIT
SEMICONDUCTOR TECHNICAL DATA
16 1
* * * * * * * *
Internal Short Circuit Current Limiting Pinned Out 2.6 V Reference Low Voltage Reset Comparator Power Warning Comparator with Programmable Hysteresis Uncommitted Comparator Low Standby Current Internal Thermal Shutdown Protection Heat Tab Power Package Representative Block Diagram
VCC 14 + Thermal Shutdown - + 2.6 V Reference + - + IH IH On/Off 0.913 R + 0.01 R - R Reset 7 Reference Output 16 Power Warning 8 Regulator Output 11
P SUFFIX PLASTIC PACKAGE CASE 648C (DIP-16)
16 1
DW SUFFIX PLASTIC PACKAGE CASE 751G (SOP-16L)
PIN CONNECTIONS
Comp. Inv. In Comp. Noninv. In N.C. Gnd 5 Comp. Out Reset Power Warning 6 7 8 (Top View) 12 11 10 9 Reg. Out Hyst. Adj. Power Sense 1 2 3 4 16 15 14 13 Gnd Vref Chip Disable VCC
Chip Disable 15 Power Sense 9 Hysteresis Adjust 10 Noninverting Input 2 Inverting Input 1
+ + -
Comparator Output 6 Device
ORDERING INFORMATION
Operating Temperature Range TA = 0 to +70C Package SOP-16L DIP-16 SOP-16L TA = - 40 to +85C DIP-16
Rev 1
Gnd
4, 5, 12, 13
MC34160DW MC34160P
This device contains 72 active transistors.
MC33160DW MC33160P
(c) Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
MC34160 MC33160
MAXIMUM RATINGS
Rating Power Supply Voltage Chip Disable Input Voltage (Pin 15, Note 1) Comparator Input Current (Pins 1, 2, 9) Comparator Output Voltage (Pins 6, 7, 8) Comparator Output Sink Current (Pins 6, 7, 8) Power Dissipation and Thermal Characteristics P Suffix, Dual-In-Line Case 648C Thermal Resistance, Junction-to-Air Thermal Resistance, Junction-to-Case (Pins 4, 5, 12, 13) DW Suffix, Surface Mount Case 751G Thermal Resistance, Junction-to-Air Thermal Resistance, Junction-to-Case (Pins 4, 5, 12, 13) Operating Junction Temperature Operating Ambient Temperature MC34160 MC33160 Storage Temperature Range Symbol VCC VCD Iin VO ISink Value 40 -0.3 to VCC -2.0 to +2.0 40 10 Unit V V mA V mA C/W RJA RJC RJA RJC TJ TA 0 to +70 -40 to +85 Tstg -65 to +150 C 80 15 94 18 +150 C C
ELECTRICAL CHARACTERISTICS (VCC = 30 V, IO = 10 mA, Iref = 100 A) For typical values TA = 25C, for min/max values TA is the operating ambient temperature range that applies [Notes 2 and 3], unless otherwise noted.)
Characteristics REGULATOR SECTION Total Output Variation (VCC = 7.0 V to 40 V, IO = 1.0 mA to 100 mA, TA = Tlow to Thigh) Line Regulation (VCC = 7.0 V to 40 V, TA = 25C) Load Regulation (IO = 1.0 V to 100 mA, TA = 25C) Ripple Rejection (VCC = 25 V to 35 V, IO = 40 mA, f = 120 Hz, TA = 25C) REFERENCE SECTION Total Output Variation (VCC = 7.0 to 40 V, IO = 0.1 mA to 2.0 mA, TA = Tlow to Thigh) Line Regulation (VCC = 5.0 V to 40 V, TA = 25C) Load Regulation (IO = 0.1 mA to 2.0 mA, TA = 25C) RESET COMPARATOR Threshold Voltage High State Output (Pin 11 Increasing) Low State Output (Pin 11 Decreasing) Hysteresis Output Sink Saturation (VCC = 4.5 V, ISink = 2.0 mA) Output Off-State Leakage (VOH = 40 V) V VIH VIL VH VOL IOH - 4.55 0.02 - - (VO-0.11) (VO-0.18) 0.07 - - (VO-0.05) - - 0.4 4.0 V A Vref Regline Regload 2.47 - - 2.6 2.0 4.0 2.73 20 30 V mV mV VO Regline Regload RR 4.75 - - 50 5.0 5.0 20 6.5 5.25 40 50 - V mV mV dB Symbol Min Typ Max Unit
NOTES: 1. The maximum voltage range is -0.3 V to VCC or +35 V, whichever is less. 2. Tlow = 0C for MC34160 Thigh = 70C for MC34160 -40C for MC33160 85C for MC33160 3. Low duty cycle pulse testing techniques are used during test to maintain junction temperature as close to ambient as possible.
2
MOTOROLA ANALOG IC DEVICE DATA
MC34160 MC33160
ELECTRICAL CHARACTERISTICS (continued) (VCC = 30 V, IO = 10 mA, Iref = 100 A) For typical values TA = 25C, for min/max
values TA is the operating ambient temperature range that applies [Notes 2 and 3], unless otherwise noted.) Characteristics POWER WARNING COMPARATOR Input Offset Voltage Input Bias Current (VPin 9 = 3.0 V) Input Hysteresis Current (VPin 9 = Vref - 100 mV) RPin 10 = 24 k RPin 10 = Output Sink Saturation (ISink = 2.0 mA) Output Off-State Leakage (VOH = 40 V) UNCOMMITTED COMPARATOR Input Offset Voltage (Output Transition Low to High) Input Hysteresis Voltage (Output Transition High to Low) Input Bias Current (VPin 1, 2 = 2.6 V) Input Common Mode Voltage Range Output Sink Saturation (ISink = 2.0 mA) Output Off-State Leakage (VOH = 40 V) TOTAL DEVICE Chip Disable Threshold Voltage (Pin 15) High State (Chip Disabled) Low State (Chip Enabled) Chip Disable Input Current (Pin 15) High State (Vin = 2.5 V) Low State (Vin = 0.8 V) Chip Disable Input Resistance (Pin 15) Operating Voltage Range VO (Pin 11) Regulated Vref (Pin 16) Regulated Power Supply Current Standby (Chip Disable High State) Operating (Chip Disable Low State) V VIH VIL IIH IIL Rin VCC 7.0 to 40 5.0 to 40 ICC - - 0.18 1.5 0.35 3.0 - - - - mA 2.5 - - - 50 - - - - 100 - 0.8 A 100 30 - k V VIO IH IIB VICR VOL IOH - 140 - 0.6 to 5.0 - - - 200 - - 0.13 - 20 260 -1.0 - 0.4 4.0 mV mV A V V A VIO IIB IH 40 4.5 VOL IOH - - 50 7.5 0.13 - 60 11 0.4 4.0 V A - - 1.2 - 10 0.5 mV A A Symbol Min Typ Max Unit
NOTES: 1. The maximum voltage range is -0.3 V to VCC or +35 V, whichever is less. 2. Tlow = 0C for MC34160 Thigh = 70C for MC34160 -40C for MC33160 85C for MC33160 3. Low duty cycle pulse testing techniques are used during test to maintain junction temperature as close to ambient as possible.
V O , REGULATOR OUTPUT VOLTAGE CHANGE (mV)
Figure 1. Regulator Output Voltage Change versus Source Current
0 6.0
Figure 2. Reference and Regulator Output versus Supply Voltage
RL =
1
RL = 50
Regulator Output
-4.0
OUTPUT VOLTAGE (V)
4.0
-8.0
Reference Output 2.0
RL =
1
-12
VCC = 7.5 V TA = 25C
TA = 25C 0 0 10 20 30 VCC, SUPPLY VOLTAGE (V) 40
-16 0 40 80 120 IO, REGULATOR OUTPUT SOURCE CURRENT (mA) 160
MOTOROLA ANALOG IC DEVICE DATA
3
MC34160 MC33160
V ref , REFERENCE OUTPUT VOLTAGE CHANGE (mV)
Figure 3. Reference Output Voltage Change versus Source Current
0 I H , HYSTERESIS CURRENT ( A) 60
Figure 4. Power Warning Hysteresis Current versus Programming Resistor
-8.0
40
VCC = 30 V VPin 9 = 2.5 V TA = 25C
-16
20
-24
VCC = 7.5 V TA = 25C
-32 0 2.0 4.0 6.0 8.0 Iref, REFERENCE OUTPUT SOURCE CURRENT (mA)
0 20 40 60 80 100 120 140 RH, PROGRAMMING RESISTOR (kW)
Figure 5. Power Warning Comparator Delay versus Temperature
800 t DLY, OUTPUT DELAY TIME (ns) t DLY , OUTPUT DELAY TIME (ns) VCC = 30 V Vin (Pin 9) = 2.5 V to 2.7 V RL = 2.4 k to VO 600 Output Rise 360 440
Figure 6. Uncommitted Comparator Delay versus Temperature
VCC = 30 V VPin 1 = 2.5 V to 2.9 V VPin 2 = 2.6 V RL = 2.4 k to VO
Output Rise
280 Output Fall 200
Output Fall 400
200 -55
-25
0
25
50
75
100
125
120 -55
-25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
R JA, THERMAL RESISTANCE JUNCTION TO AIR ( C/W)
Figure 7. Comparator Output Saturation versus Sink Current
0.5 V OL , OUTPUT SATURATION (V) 0.4 0.3 0.2 0.1 0 0 2.0 4.0 ISink, SINK CURRENT (mA) 6.0 8.0 TA = 85C VCC = 6.0 V VPin 1 = Vref VPin 2, 9 = 10 k to Gnd Vsat = Pins 6, 7, 8 TA = 25C TA = -40C
Figure 8. P Suffix (DIP-16) Thermal Resistance and Maximum Power DIssipation versus P.C.B. Copper Length
Printed circuit board heatsink example
80 60 40 RJA
4.0 3.0 2.0
L
2.0 oz. Copper
L 3.0 mm Graphs represent symmetrical layout
20 0
PD(max) for TA = 70C
1.0 0 50
0
10
20
30
40
L, LENGTH OF COPPER (mm)
4
MOTOROLA ANALOG IC DEVICE DATA
P D, MAXIMUM POWER DISSIPATION (W)
100
5.0
EEEEEE EEEEEE EEEEEE
MC34160 MC33160
Figure 9. DW Suffix (SOP-16L) Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
100 R JA, THERMAL RESISTANCE 90 80 70 L 60 50 40 30 0 10 20 30 L, LENGTH OF COPPER (mm) 40 RJA PD(max) for TA = 50C 2.4 2.0 1.6 1.2 0.8 0.4 PD, MAXIMUM POWER DISSIPATION (W) 2.8
JUNCTION-TO-AIR (C/W)
PIN FUNCTION DESCRIPTION
Pin 1 2 3 4, 5, 12, 13 6 7 8 9 10 11 14 15 16 Function Comparator Inverting Input Comparator Noninverting Input N.C. Gnd Comparator Output Reset Power Warning Power Sense Hysteresis Adjust Regulator Output VCC Chip Disable Vref Description This is the Uncommitted Comparator Inverting input. It is typically connected to a resistor divider to monitor a voltage. This is the Uncommitted Comparator Noninverting input. It is typically connected to a reference voltage. No connection. This pin is not internally connected. These pins are the control circuit grounds and are connected to the source and load ground returns. They are part of the IC lead frame and can be used for heatsinking. This is the Uncommitted Comparator output. It is an open collector sink-only output requiring a pull-up resistor. This is the Reset Comparator output. It is an open collector sink-only output requiring a pull-up resistor. This is the Power Warning Comparator output. It is an open collector sink-only output requiring a pull-up resistor. This is the Power Warning Comparator noninverting input. It is typically connected to a resistor divider to monitor the input power source voltage. The Power Warning Comparator hysteresis is programmed by a resistor connected from this pin to ground. This is the 5.0 V Regulator output. This pin is the positive supply input of the control IC. This input is used to switch the IC into a standby mode turning off all outputs. This is the 2.6 V Reference output. It is intended to be used in conjunction with the Power Warning and Uncommitted comparators.
OPERATING DESCRIPTION
The MC34160 series is a monolithic voltage regulator and supervisory circuit containing many of the necessary monitoring functions required in microprocessor based systems. It is specifically designed for appliance and industrial applications, offering the designer a cost effective solution with minimal external components. These devices are specified for operation over an input voltage of 7.0 V to 40 V, and with a junction temperature of -40 to +150C. A typical microprocessor application is shown in Figure 10. Regulator The 5.0 V regulator is designed to source in excess of 100 mA output current and is short circuit protected. The output has a guaranteed tolerance of 5.0% over line, load, and temperature. Internal thermal shutdown circuitry is included to limit the maximum junction temperature to a safe level. When activated, typically at 170C, the regulator output turns off. In specific situations a combination of input and output bypass capacitors may be required for regulator stability. If the regulator is located an appreciable distance ( 4) from the supply filter, an input bypass capacitor (Cin) of 0.33 F or greater is suggested. Output capacitance values of less than 5.0 nF may cause regulator instability at light load ( 1.0 mA) and cold temperature. An output bypass capacitor of 0.1 F or greater is recommended to ensure stability under all load conditions. The capacitors selected must provide good high frequency characteristics. Good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator does not have external sense inputs.
MOTOROLA ANALOG IC DEVICE DATA
III III III I IIIIIII I III
2.0 oz. Copper L 3.0 mm
Graph represents symmetrical layout
0 50
5
MC34160 MC33160
Reference The 2.6 V bandgap reference is short circuit protected and has a guaranteed output tolerance of 5.0% over line, load, and temperature. It is intended to be used in conjunction with the Power Warning and Uncommitted comparator. The reference can source in excess of 2.0 mA and sink a maximum of 10 A. For additional current sinking capability, an external load resistor to ground must be used. Reference biasing is internally derived from either VCC or VO, allowing proper operation if either drops below nominal. Chip Disable This input is used to switch the IC into a standby mode. When activated, internal biasing for the entire die is removed causing all outputs to turn off. This reduces the power supply current (ICC) to less than 0.3 mA. Comparators Three separate comparators are incorporated for voltage monitoring. Their outputs can provide diagnostic information to the microprocessor, preventing system malfunctions. The Reset Comparator Inverting Input is internally connected to the 2.6 V reference while the Noninverting Input monitors VO. The Reset Output is active low when VO falls approximately 180 mV below its regulated voltage. To prevent erratic operation when crossing the comparator threshold, 70 mV of hysteresis is provided. The Power Warning Comparator is typically used to detect an impending loss of system power. The Inverting Input is internally connected to the reference, fixing the threshold at 2.6 V. The input power source Vin is monitored by the Noninverting Input through the R1/R2 divider (Figure 10). This input features an adjustable 10 A to 50 A current sink IH that is programmed by the value selected for resistor RH. A default current of 6.5 A is provided if RH is omitted. When the comparator input falls below 2.6 V, the current sink is activated. This produces hysteresis if Vin is monitored through a series resistor (R1). The comparator thresholds are defined as follows: R1 - IIB R1 Vth(lower) = Vref 1 + R2 R1 + IH R1 Vth(upper) = Vref 1 + R2 The nominal hysteresis current I H equals 1.2 V/RH (Figure 4). The Uncommitted Comparator can be used to synchronize the microprocessor with the ac line signal for timing functions, or for synchronous load switching. It can also be connected as a line loss detector as shown in Figure 11. The comparator contains 200 mV of hysteresis preventing erractic output behavior when crossing the input threshold. The Power Warning and Uncommitted Comparators each have a transistor base-emitter connected across their inputs. The base input normally connects to a voltage reference while the emitter input connects to the voltage to be monitored. The transistor limits the negative excursion on the emitter input to - 0.7 V below the base input by supply current from VCC. This clamp current will prevent forward biasing the IC substrate. Zener diodes are connected to the comparator inputs to enhance the ICs electrostatic discharge capability. Resistors R1 and Rin must limit the input current to a maximum of 2.0 mA. Each comparator output consists of an open collector NPN transistor capable of sinking 2.0 mA with a saturation voltage less than 0.4 V, and standing off 40 V with minimal leakage. Internal bias for the Reset and Power Warning Comparators is derived from either VCC or the regulator output to ensure functionality when either is below nominal. Heat Tab Package The MC34160 is contained in a 16 lead plastic dual-in-line package in which the die is mounted on a special Heat Tab copper alloy lead frame. This tab consists of the four center ground pins that are specifically designed to improve thermal conduction from the die to the surrounding air. The pictorial in Figure 8 shows a simple but effective method of utilizing the printed circuit board medium as a heat dissipator by soldering these tabs to an adequate area of copper foil. This permits the use of standard board layout and mounting practices while having the ability to more than halve the junction to air thermal resistance. The example and graph are for a symmetrical layout on a single sided board with one ounce per square foot copper.
Figure 10. Typical Microprocessor Application
Vin VCC Cin R1 Chip Disable 15 2.6 V Reference + - + R2 RH 2.6 V AC Line Rin 9 IH 10 2 1 + + - Uncommitted Comparator 6 IH On/Off 14 + Thermal Shutdown - + 0.913 R .01 R R Power Warning 16 8 Vref Power Warning + - Reset 11 7 CO VO MPU Reset
Line Sync.
4, 5, 12, 13
+ -
= Positive True Logic
Sink Only
6
MOTOROLA ANALOG IC DEVICE DATA
MC34160 MC33160
Figure 11. Line Loss Detector Application
VCC Vin Cin 14
+
Thermal Shutdown - + 2.6 V Reference 0.913 R .01 R R + - Reset 11 7 CO VO MPU Reset
Chip Disable R1 Point A Pin 6 Pin 8 2.6 V 2.6 V
15
+
+ -
Power Warning
10 8
Vref Line Loss Output
9 IH 10 2 IH On/Off
RDLY
+
+ -
Rin AC Line A 1
Uncommitted Comparator 6
4, 5, 12, 13
CDLY tDLY RDLY CDLY ln IH RDLY - VO Vref + IH R1 - VO + IH RDLY + -
= Sink Only
Positive True Logic
Figure 12. Time Delayed Microprocessor Reset
VCC Cin R1 Chip Disable 15 2.6 V Reference 14
+
Thermal Shutdown 0.913 R .01 R R 11
Vin
- + +
+ -
Reset
CO
VO
7 Vref RDLY
R2
9 IH RH 10 2 1 3.6 k 6.2 k tDLY IH On/Off
+ -
Power Warning
16 8
+ + -
Uncommitted Comparator 6 MPU Reset
4, 5, 12, 13
RDLY CDLY
CDLY Sink Only = Positive True Logic
+ -
MOTOROLA ANALOG IC DEVICE DATA
7
MC34160 MC33160
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 648C-03 (DIP-16)
9
-A-
16
-B-
1 8
L
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. INTERNAL LEAD CONNECTION, BETWEEN 4 AND 5, 12 AND 13. INCHES MIN MAX 0.740 0.840 0.240 0.260 0.145 0.185 0.015 0.021 0.050 BSC 0.040 0.070 0.100 BSC 0.008 0.015 0.115 0.135 0.300 BSC 0 10 0.015 0.040 MILLIMETERS MIN MAX 18.80 21.34 6.10 6.60 3.69 4.69 0.38 0.53 1.27 BSC 1.02 1.78 2.54 BSC 0.20 0.38 2.92 3.43 7.62 BSC 0 10 0.39 1.01
NOTE 5
C -T-
SEATING PLANE
N F E G D 16 PL 0.13 (0.005)
M
M K J 16 PL 0.13 (0.005)
M
TB
S
T
A
S
DIM A B C D E F G J K L M N
-A-
16 9
DW SUFFIX PLASTIC PACKAGE CASE 751G-02 (SOP-16L)
-B- P 8 PL 0.25 (0.010)
1 8 M
B
M
G 14 PL
J
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 10.15 10.45 7.60 7.40 2.65 2.35 0.49 0.35 0.90 0.50 1.27 BSC 0.32 0.25 0.25 0.10 7 0 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.400 0.411 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0 7 0.395 0.415 0.010 0.029
F R X 45 C -T- D 16 PL 0.25 (0.010) K
M SEATING PLANE S
M
S
TA
B
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8
*MC34160/D*
MOTOROLA ANALOG IC DEVICE DATA MC34160/D

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